Ensure the batteries are inserted with the correct polarity (+/-).

method: press and hold the "SET" button for 5–10 seconds until the code on the screen starts flashing and cycling. Essential Operations

: Press the Power button once to send an activation signal. The AC should beep or its display should change to confirm the connection. Core Button Functions

: If your AC display shows "F0," it often indicates low refrigerant gas. Codes like "F1," "F2," or "F3" typically signal sensor faults. Where to Find the Full Manual

: Indicated by a fan symbol; it circulates air without cooling or heating. Error Codes

Activates the horizontal or vertical louver movement.